Back to EveryPatent.com
United States Patent | 5,009,555 |
Kitamura | April 23, 1991 |
A machine tool has a machine tool body (3), a spindle (1) having a supporting portion (2) and being rotatably supported by the machine tool body (3), and a tool holder (5) having an inserting portion (6) attached to the supporting portion (2). A coating layer (10) made of a hard material including titanium is provided on the supporting portion (2) of the spindle (1) and/or the inserting portion (6) of the tool holder (5).
Inventors: | Kitamura; Koichiro (Toyama, JP) |
Assignee: | Kitamura Machinery Co., Ltd. (Toyama, JP) |
Appl. No.: | 322125 |
Filed: | March 13, 1989 |
Mar 25, 1988[JP] | 63-69256 |
Current U.S. Class: | 409/232; 279/900; 408/239R; 409/234 |
Intern'l Class: | B23B 031/04 |
Field of Search: | 409/232-234 29/DIG. 45 427/255.2,249,248.1,295 279/1 TS 408/239 A,239 R,226 |
4463033 | Jul., 1984 | Kikuchi et al. | 427/255. |
4607989 | Aug., 1986 | Kitamura | 409/234. |
4619866 | Oct., 1986 | Smith et al. | 427/255. |
Foreign Patent Documents | |||
175064 | Mar., 1986 | EP | 409/231. |
21706 | Feb., 1981 | JP | 409/232. |
79932 | Apr., 1987 | JP | 409/232. |